wild.blue(at)verizon.net
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 Posted: Thu Jan 31, 2008 6:11 am Post subject: Let there be Air |
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Craig--
I haven't given this much thought or consulted schematics, and this may not relate to your leakage problem, but Terry McLaughlin had trouble with the air system on that airplane (if we're talking about the same airplane). Namely, pressurized air was getting to both sides of the gear actuators during retraction and the gear would get stuck partially retracted. It may have had something to do with emergency air or it could have been an internal leak or it could have been improperly assembled--I don't recall. I flew the first flights on it, no problemo, so it sounded more like an internal leak or emergency valve leak. He seldom flew the airplane, in part because of that problem, and I'm not sure he ever got it figured out. I would very carefully inspect the system for plumbing logic as well as leaks. Terry was a pretty good mechanic, if a bit of the "hammer and vise-grips" school (no offense), but I really don't remember that he got it properly sorted out.
And, FWIW, as Pappy says, its very simple to bypass the rear valve altogether. In the neutral position its just an open passage to the front valve? Series or parallel?--don't recall. Kind of a time bomb back there and unnecessary unless you're using it for training. Never thought it was such a good idea for training, either, myself.
PS
I take it from your email address that you have or had a CAP, no? Which model? Howdja like it? I've had half an eye out for a CAP-10 for a while--not many around. I'd like to find a type certificated acro trainer that's a little nicer to fly than a Decathlon, has a little power (ah, no, not Aerobats, even with an O-320), but not a Pitts, that doesn't cost a gazillion and is big enough inside, gross wt. etc. for real people, something I can let people solo and still sleep. RV-4's are pretty tight in the back, haven't flown a -6, -7's and -8's cost too much. Actually prefer something with a nosewheel (no snickers, please). -52's are great but have a dark side lurking for the uninitiated, CJ's no negative (usually) and too much $$ (yes, I'm, er, cheap--no, just financially challenged! Ever heard of a CFI that actually made any money? Me, either, sigh). OTH, even given all the commie jet training operations etc., do the feds allow commercial training in a school-owned experimental airplane? I guess they must (eh, Larry Salganek et al?), but I can't find it in print. A few years ago EAA got an exemption (had one myself--don't know what I did with it), and (as I recall) EAA administered it, but now I can't find it. I think it only allowed training in the trainee's own airplane, not in a school-owned airplane? Getting senile (and lazy), I guess, and a little nervous about putting my certificate on the line. Anybody have an FAR/EAA citation on the subject? Barry?
Jerry Painter
Wild Blue Aviation
425-876-0865
JP(at)FlyWBA.com (JP(at)FlyWBA.com)
www.FlyWBA.com
Time: 05:27:28 AM PST US
Subject: CJ Air Leak from Rear Gear Handle
From: "Craig Winkelmann, CFI" <capav8r(at)gmail.com (capav8r(at)gmail.com)>
I have a leak from the rear gear handle. I have isolated it to the small hole
in the side of the body of the mechanism behind the panel. With main air on and
engine not running it will bleed down the main air tank in about 10-15 minutes.
How do I isolate the problem to either the gear handle or something else in the
gear system that is leaking through this vent hole?
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=161337#161337
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